1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/jitcraft/Barriers.h	Fri Jun 29 19:35:17 2012 -0700
     1.3 @@ -0,0 +1,58 @@
     1.4 +/*
     1.5 + * Copyright (C) 2012 David Anderson
     1.6 + *
     1.7 + * This file is part of JITCraft.
     1.8 + *
     1.9 + * JITCraft is free software: you can redistribute it and/or modify it under
    1.10 + * the terms of the GNU General Public License as published by the Free
    1.11 + * Software Foundation, either version 3 of the License, or (at your option)
    1.12 + * any later version.
    1.13 + * 
    1.14 + * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY
    1.15 + * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    1.16 + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License along with
    1.19 + * JITCraft. If not, see http://www.gnu.org/licenses/.
    1.20 + */
    1.21 +#ifndef _include_jitcraft_barriers_h_
    1.22 +#define _include_jitcraft_barriers_h_
    1.23 +
    1.24 +namespace jc {
    1.25 +
    1.26 +// Used to store unbarriered heap locations.
    1.27 +template <typename T>
    1.28 +class Unbarriered
    1.29 +{
    1.30 +    Object *obj_;
    1.31 +
    1.32 +  public:
    1.33 +    Unbarriered()
    1.34 +      : obj_(NULL)
    1.35 +    {
    1.36 +    }
    1.37 +
    1.38 +    T *operator ->() const {
    1.39 +        return operator *();
    1.40 +    }
    1.41 +    T *operator *() const {
    1.42 +        return static_cast<T *>(obj_);
    1.43 +    }
    1.44 +    Unbarriered &operator =(T *obj) {
    1.45 +        obj_ = obj;
    1.46 +        return *this;
    1.47 +    }
    1.48 +    Object **addr() {
    1.49 +        return &obj_;
    1.50 +    }
    1.51 +    operator bool () const {
    1.52 +        return !!obj_;
    1.53 +    }
    1.54 +    operator T*() const {
    1.55 +        return static_cast<T *>(obj_);
    1.56 +    }
    1.57 +};
    1.58 +
    1.59 +}
    1.60 +
    1.61 +#endif // _include_jitcraft_barriers_h_